West Suffolk College was the top provider in the country for adults taking GCSE English last year.
The college ranked top of more than 170 further education provider colleges nationally with nearly 70 per-cent of students getting grades A* to C.
Adult achievement rates for GCSE maths was also well above the national average - making it the fourth most successful college for that subject.
"This success is down to our very committed teaching staff and dedicated students. Our team really support the adults that come to us, some of whom feel really nervous about coming back to the classroom. The staff support them both academically and personally to achieve and engage with the subject and go above and beyond to create adult specific sessions that the learners will find stimulating. In addition, the students really benefit from the detailed feedback from their assessments and homework and this provides the support needed to ensure that the students keep coming back every week and that they know how they can improve to keep on achieving those high grades. In essence it's just really good teaching."
The college said many adult learners found returning to the classroom an anxious experience, so aimed to make the transition as smooth as possible.
The college has organised a series of free taster sessions throughout this week in Thetford, with sessions including yoga, photography, floristry, Spanish and using Microsoft Excel.